查询词典 simulation test

Electric parking brake ; software in the loop simulation ; software test

汽车电动手闸系统；软件在线仿真；软件测试

Based on these, the single phase converter system is studied in detail, including the selection of the main circuit scheme, the formation of Sine-wave Pulse- width Modulation signal, the design of the drive and protection circuit of IGBT, and the design of high frequency transformer. Finally, the simulation software is employed to test the effect. And the result is satisfactory.

在此基础上，本文主要对电能质量控制稳定器所需的DC/AC控制电源进行了详细研究，包括主电路方案的选择、SPWM波的生成、IGBT的驱动和保护电路、高频变压器的设计以及闭环电压控制原理，最后进行了输出电压的计算机仿真分析，结果是令人满意的。

To reveal aft end internal flow feature of a solid rocket motor with submerged nozzle, a two dimension cold flow test model with rectangular channel was designed The cold gas simulation was based on geometric similarity and aerodynamic analogy Mean and fluctuating velocity field was measured using phase doppler particle analyzer It showed that the flow separates at upstream of the submerged nozzle and reattaches on the tip of the nozzle nose A relatively steady recirculation zone formed in...

为了揭示含潜入喷管的固体火箭发动机尾部流动特征，按照几何相近和气动相似原则设计了通道为矩形的二维冷流实验模型，利用相位多普勒粒子分析仪对燃烧室尾部气流的时均速度和湍流脉动速度进行了测量。实验结果表明气流在潜入喷管入口上游发生分离，再附点位于喷管前端部外侧，背壁空腔内形成一个较为稳定的回流区，流场的轴向和横向湍流强度都比较大

Simulation results of different test cases proved the effectiveness of this approach and the accuracy and sensitivity of the algorithm have also been verified by the program. The study of optimum sampling rate provides a theoretical basis and pre-experimental basis for the practical engineering applications and products design.

综上所述，本文提出的仿真模型具有较高的实用性，编写的保护算法程序有效并且运行可靠，仿真结果验证了保护算法的正确性，最优采样率的研究为实际工程应用和产品化提供了理论依据和前期实验基础。

In this thesis, on the basis of theoretical analysis, numerical simulation and test study, the working principle and working process of central tube explosive ejection device and combustion gas ejection device equipped with star-shaped frame are analysed, the mathematical model of the inner ballstics of ejection devices and dynamical ejection model of submunition are established.

本文在理论分析、数值模拟与试验研究三者相结合的基础上，分析了中心管式爆炸抛撒装置与星形框式燃气抛撒装置的作用原理和作用过程，建立了抛撒装置内弹道的数学物理模型以及子弹抛撒动力学模型。

Bridge engineering ; central-slotted box girder ; wind tunnel test ; flutter performance ; CFD numerical simulation ; flutter control

桥梁工程；中央开槽箱梁；风洞试验；颤振性能； CFD数值模拟；颤振控制

By field and indoor test, the paper measures soil physical property, soilmoisture constant and soil water movement parameter, provides the soil specificgravity , the soil apparent density, the soil fraction, the soil field moisturecapacity, the soil saturated moisture capacity, the soil percent moisture content ofcom germination and seedlings emergence, the corn wilting point, and alsoestablishes the equation of soil water retention curves, the equation of soil waterdispersion coefficient and the relationship between pressure and soil apparentdensity, and so those provides the parameter for numerical simulation.

通过田间和室内试验，测定了供试土壤的物理性质、土壤水分常数和土壤水分运动参数，得到了该土样的比重、容重、机械组成、田间持水率、饱和含水率、玉米种子发芽出苗土壤含水率、玉米凋萎系数，给出了土壤水分特征曲线方程、土壤水分扩散系数方程及土壤容重与土壤压紧力的关系，提供了数值模拟过程中所需的参数。

Simulation and test study for a pH neutralization process indicate that predictive control based on Hammerstein models can provide much better control performance than well-tuned PID controllers.

研究结果表明，Hammerstein 模型非线性预测控制具有良好的控制效果和很强的稳定性，且优于常用的PID 控制方法。

Both the lab test and the computer simulation analysis demonstrate that construction process has influence to every surveyed item, lateral displacement and settlement volume are influenced much more violently.

室内模拟试验和计算机分析结果都表明，施工过程对基坑的各项监测指标都有影响，特别是侧向位移和沉降量响应明显。

The experiment table on heat transfer of finned tube is established to test the validity of numerical simulation. The heat and temperature distribution of tube and the air around tube are measured.

为了证明以上模拟结果的准确性，建立了翅片管换热实验台，通过实验测出翅片管及其周围空气的温度分布和散热量，与数值模拟结果进行比较，从而验证了数值计算的准确性。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。